A．二氧化碳气体
B．盐酸溶液
C．蔗糖溶液
D．固体氯化钠
答案：B
-Where are the children? The dinner’s going to be completely ruined．
-I wish they ________always late． [ ]
A．weren’t
B．hadn’t been
C．wouldn’t be
D．wouldn’t have been
牙周病检查时，牙周探诊用力应是
A．10～20g
B．20～25g
C．25g以上
D．15～20g
E．20g以下
